Case Analysis & Practical Application Flashcards

A 48-year-old hemodialysis patient reports consuming a phosphorus-restricted diet but continues to have phosphorus levels of 6.8 mg/dL. On review, her diet includes frequent consumption of processed meats and fast food. What is the likely dietary contributor?

Answer: Phosphate additives in processed foods are highly bioavailable and likely driving hyperphosphatemia

Inorganic phosphate additives in processed foods are nearly 100% bioavailable, making them a major and often overlooked contributor to hyperphosphatemia in dialysis patients.

A CKD patient with nephrotic syndrome has a serum albumin of 2.2 g/dL and significant edema. Urinary protein loss is 8 g/day. How should the renal dietitian approach protein recommendations?

Answer: Provide adequate protein (0.8-1.0 g/kg/day) to account for urinary losses without excessive intake that could worsen proteinuria

Nephrotic syndrome guidelines recommend 0.8-1.0 g/kg/day protein to replace urinary losses adequately without stimulating further proteinuria.

A dialysis patient is admitted to the hospital for cardiac surgery. During the post-operative period, she requires parenteral nutrition. Which modification is MOST important for renal-specific PN formulation?

Answer: Use renal-formulated PN with adjusted electrolytes (reduced potassium and phosphorus) and high-quality protein

Renal-specific PN formulations limit potassium, phosphorus, and fluid while providing essential amino acids to meet metabolic needs without exacerbating electrolyte imbalances.

A renal dietitian reviews a 3-day food record for a CKD Stage 4 patient and calculates an average intake of 42 g protein/day for a 70 kg patient. The estimated requirement is 49 g/day. What INITIAL strategy should the dietitian recommend?

Answer: Identify specific low-protein meals and add high biological value protein foods the patient already enjoys

Identifying specific low-protein meals and incorporating preferred high-quality protein sources is a practical first step that is more likely to achieve sustained adherence.

A peritoneal dialysis patient using 2.5% dextrose dialysate for most exchanges develops new hypertriglyceridemia with triglycerides of 380 mg/dL. What dietary and prescription consideration should the renal dietitian address?

Answer: Reduce dietary simple carbohydrates and discuss with the nephrology team about switching to icodextrin for one exchange to reduce glucose load

Glucose absorbed from PD dialysate is a major driver of hypertriglyceridemia; reducing dietary simple carbs and substituting icodextrin (a glucose polymer with lower absorption) addresses both dietary and dialysis-related contributions.

A 55-year-old male hemodialysis patient has a serum ferritin of 950 ng/mL and TSAT of 22%. His hemoglobin is 9.8 g/dL despite erythropoiesis-stimulating agent (ESA) therapy. What is the likely explanation and dietary consideration?

Answer: Functional iron deficiency or inflammation (high ferritin with low TSAT) may be contributing; dietary iron changes are unlikely to be effective in the context of inflammation

Elevated ferritin with low TSAT in dialysis patients suggests functional iron deficiency or anemia of inflammation, where dietary iron modification has minimal impact and IV iron may be needed.

A renal dietitian conducts a group education session for new hemodialysis patients. One patient states, 'I heard I should eat as much protein as possible on dialysis days and none on off days.' How should the dietitian respond?

Answer: Correct this misconception: protein intake should be consistent daily to meet ongoing metabolic needs and prevent catabolism on non-dialysis days

Protein catabolism and muscle wasting occur every day regardless of dialysis schedule; consistent daily protein intake is essential to maintain lean body mass.